The course I'm applying to has given me an enormous pre-interview task to do and whilst I can confidently approach most of the questions, I've found a few (admittedly basic) parts of the task to be quite perplexing. Please see below and comment if you can:

1) Sentence parts - in the below sentence, what is the word "down"? Is it a preposition? Or perhaps it is part of the adverb "quickly" as in "quickly down"? I am really stuck with this one.

'He ran quickly down the stairs'

2) Sentence parts again - What is the word "from" in the below sentence